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16.11: More About -able and -ible

Difficulty Level: At Grade Created by: CK-12
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More About -able and -ible

1. In the previous lesson you saw that stems that form nouns with <ation> take -able to form adjectives. In the Verb column list the verb from which each adjective is derived:

Verb Adjective
appreciate appreciable
calculate
communicate
demonstrate
equate
estimate
navigate
negotiate
penetrate
remediate
separate
venerate
anticipate
circulate
create
indicate
locate
translate

5. Do verbs that end in -ate take -ible or -able? _________

That gives us our second useful generalization: Verbs that end in <ate> take -able to form adjectives.

3. In the Verb column list the verb from which each adjective is derived:

Verb Adjective
classify classifiable
deniable
enviable
justify justifiable
leviable
magnify magnifiable
modify modifiable
multiply multipliable
notify notifiable
pity
rely
vary

Which do verbs that end in <y> take to form adjectives, -ible or -able ? -able

Notice that if a verb that ends in <y>, like deny, took -ible, the <y> to <i> change would lead to deniible, which wouldn't work since we avoid <ii> in English. If we deleted one of the <i>'s, we'd get denible, which doesn't fit the pronunciation because it leaves one vowel sound unspelled. So -able must be the logical choice.

That gives us our third useful generalization: Verbs that end in <y> take -able to form adjectives.

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1 , 2 , 3 , 4 , 5
Date Created:
Feb 23, 2012
Last Modified:
Jan 16, 2015
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